"Kotenkotenko" is a slice-of-life anime series centered around the daily lives and interactions of a group of high school students in a rural Japanese town. The narrative unfolds through the perspective of Haruto, a reserved and observant transfer student who moves to the town after his family relocates due to his father's job. Haruto's arrival introduces him to a close-knit group of classmates, each with distinct personalities and backgrounds, who gradually draw him out of his shell.

The story emphasizes the mundane yet meaningful moments of adolescence, exploring themes of friendship, self-discovery, and the passage of time. Haruto befriends Yui, an energetic and outgoing classmate who often takes the lead in group activities, and Riku, a quiet but thoughtful individual with a passion for photography. The trio, along with other classmates like the studious and pragmatic Aoi and the mischievous yet kind-hearted Sora, navigate the challenges and joys of high school life, from preparing for cultural festivals to grappling with personal insecurities.

A recurring motif in the series is the contrast between the simplicity of rural life and the characters' aspirations for the future. Haruto, initially hesitant to form deep connections, gradually becomes more involved in the community, finding solace in the group's camaraderie. Yui's unwavering optimism and Riku's introspective nature serve as catalysts for Haruto's growth, while Aoi and Sora provide comic relief and moments of heartfelt support. The narrative avoids dramatic conflicts, instead focusing on subtle emotional developments and the quiet beauty of everyday experiences.

The series also incorporates elements of seasonal change, with the passing of time reflected in the shifting landscapes of the town. This serves as a metaphor for the characters' evolving relationships and personal journeys. By the end of the series, Haruto and his friends have grown closer, each gaining a deeper understanding of themselves and their place in the world. "Kotenkotenko" captures the essence of adolescence through its grounded storytelling and relatable characters, offering a poignant reflection on the fleeting nature of youth.